When I was preparing for my EM interview, I couldn't find anything here. I know it's not as coding heavy but thought it might help someone out there.
Preparation
I read Cracking the PM Interview, Peopleware and skimmed over Cracking the Coding Interview. I did brush up on a few coding questions but put more emphasis on Grokking the System Design Interview. I did some mock design sessions with a friend.
I mapped out the interview process looking at these two resources and prepared accordingly:
Life at Facebook as an Engineering Manager
FB Engineering Manager Onsite Interview
What it's like working at FB as an EM
EM Interview at Facebook or Google
Interview tips for FB
Actual Process Interview Process
Overall the interview was focused on behavioral questions, leadership, personnel management, leveraging cross-functional team, risk management. I won't be able to share any specific questions due to an NDA. Coding was LC easy to LC medium. Heavy emphasis on system design and architecture. Deep dive on all your experience regarding project management and leadership experience.
Other Resources:
www.managersclub.com
http://www.effectiveengineer.com/blog/effective-engineer-talk-at-facebook
https://www.facebook.com/pg/Engineering/videos/